Specimen

Materials

Test Types

Standard

ISO 37:2011 describes a method for the determination of the tensile stress-strain properties of vulcanized and thermoplastic rubbers. The standard has two allowable specimen geometries. The standard describes straight dumbbell specimens as well as ring shaped specimens. The properties which can be determined are tensile strength, elongation at break, stress at a given elongation, and yield point. The measurement of stress and strain at yield applies only to some thermoplastic rubbers and certain other compounds.

The challenges of testing to this standard are:

Accurate strain measurement at high elongations

Secure gripping of varying specimens

Reporting calculations in compliance with the standard

Instron Solution:

Accurate Strain Measurement – Advanced strain solutions for contacting and non-contacting strain measurement which can meet or exceed the accuracy requirements of ISO 37. A non-contacting solution like the Standard Video Extensometer (SVE 2) is ideal for all specimen types while contacting solutions such as the XL Long travel extensometer and AutoX750 are more specifically suited for robust specimens

The second generation, Standard Advanced Video Extensometer, SVE 2, is a high-performance, non-contacting extensometer that is ideally suited for everyday applications such as rubber, soft plastics,elastomers and other materials with high strain to failure. It can also be used for testing in both ambient and non-ambient temperature conditions.

The AutoX 750 is a high-resolution, long-travel automatic contacting extensometer. It can be mounted onto any electromechanical 3300, 5500, or 5900 table top and floor model systems, as well as LX, DX, HDX, and KN static hydraulic testing systems. It is well suited for applications involving plastics, metals, biomedical, composites, elastomers, and more. The AutoX has a maximum travel of 750 mm and accuracy of ± 1 µm.

5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.